Asymmetric isochalcogenourea-catalysed (4 + 2)-cycloadditions of <i>ortho</i>-quinone methides and allenoates
Anna Scheucher, Christoph Groß, Magdalena Piringer, Johanna Novacek, Armin R. Ofial, Mario Waser
Abstract
Chiral isochalcogenoureas catalyse the asymmetric (4 + 2)-cycloaddition of various allenoates with ortho -quinone methides giving access to chromane derivatives with high selectivities.
Topics & Concepts
QuinoneChemistryOrganic chemistryMedicinal chemistrySynthesis of Indole DerivativesChemical Synthesis and ReactionsCarbohydrate Chemistry and Synthesis